<template>
   <view>
      <view class="goods-list">
        <!-- 把block改造成view block不支持绑定click处理函数 -->
        <view v-for="(goods, i) in goodsList" :key="i" @click="gotoDetail(goods)">
          <my-goods :goods="goods"></my-goods>
        </view>
      </view>
    </view>
</template>

<script>
export default {
    data () {
        return {
        // 请求参数对象
            queryObj: {
                // 商品关键词
                query: '',
                // 商品分类id
                cid: '',
                // 页码值
                pagenum: 1,
                // 每页显示多少条数据
                pagesize: 10
            },
            goodsList: [],
            total: 0,
            // 默认的空图片
            defaultPic: 'https://img3.doubanio.com/f/movie/8dd0c794499fe925ae2ae89ee30cd225750457b4/pics/movie/celebrity-default-medium.png',
            isloading: false
        }
    },
    onLoad (options) {
        console.log(options)
        this.queryObj.query = options.query || ''
        this.queryObj.cid = options.cid || ''
        this.getGoodsList()
    },
    methods: {
        async getGoodsList (cb) {
            // 打开节流阀
            this.isloading = true
            const { data: res } = await uni.$http.get('/api/public/v1/goods/search', this.queryObj)
            this.isloading = false
            // 只要数据请求完毕，就立即按需执行cb回调函数
            cb && cb()
            if (res.meta.status !== 200) return uni.$showMsg()
            console.log(res)
            // 为数据赋值 通过展开运算符，进行新旧数据的拼接
            this.goodsList = [ ...this.goodsList, ...res.message.goods ]
            this.total = res.message.total
        },
        gotoDetail (goods) {
            uni.navigateTo({
                url: '/subpkg/goods_detail/goods_detail?goods_id=' + goods.goods_id
            })
        }
    },
    onReachBottom () {
        // 判断是否还有下一页数据了
        if(this.queryObj.pagenum * this.queryObj.pagesize >= this.total) return uni.$showMsg('数据加载完毕！')
        // 判断是否在请求其他的数据，如果是 则return 终止本次请求
        if (this.isloading) return
        // 让页码自增加 1
        this.queryObj.pagenum++
        this.getGoodsList()
    },
    onPullDownRefresh () {
        // 重置关键数据
        this.queryObj.pagenum = 1
        this.total = 0
        this.isloading = false
        this.goodsList = []

        // 重新发起请求
        this.getGoodsList(() => uni.stopPullDownRefresh())
    }
}
</script>

<style lang="scss">

</style>
